Lonergan Dam
Key Takeaway
Lonergan Dam is classified as high hazard in Nebraska. It was completed in 1968 and is 58 years old. Its primary use is recreation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 72 ft (taller than 99.3% in NE) |
| Dam Length | 1,320 ft |
| Dam Type | Earth |
| Max Storage | 2.6K acre-ft |
| Normal Storage | 2.0K acre-ft |
| Surface Area | 120 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 486 cfs |
| Year Completed | 1968 (58 years old) |
| NID ID | NE00030 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
JSP Lakeside LLC
Private
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Significant Hazard 50 ftFrequently Asked Questions
What is the hazard classification of Lonergan Dam?
Lonergan Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lonergan Dam?
Lonergan Dam is owned by JSP Lakeside LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lonergan Dam built?
Lonergan Dam was completed in 1968, making it 58 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Lonergan Dam?
Lonergan Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lonergan Dam?
Lonergan Dam has a dam height of 72 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Lonergan Dam last inspected?
Lonergan Dam was last inspected on October 17, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.